<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>float-layout</title>
</head>
<style>
    nav {
        float: left;
        width: 200px;
        background-color: blueviolet;
    }
    section {
        margin-left: 200px;
        background-color: chartreuse; 
    }
    .clearfix {
        overflow: auto;
        zoom:1;
    }
    li {
        display: list-item;
    }
</style>
<body>
     <div>
         <nav>
            <li>设备</li> 
            <li>位置</li>
            <li>用户</li>
         </nav>
         <section>
             <p>今天的雾霾还没有散</p>
             <p>今天的雾霾还没有散</p>
             <p>今天的雾霾还没有散</p>
         </section>
         <section>
             <p>TVB kan qilai bu xingle</p>
         </section>
     </div>
     
</body>
</html>